package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.sky.constant.MessageConstant;
import com.sky.dto.UserLoginDTO;
import com.sky.entity.User;
import com.sky.exception.LoginFailedException;
import com.sky.mapper.UserMapper;
import com.sky.properties.WeChatProperties;
import com.sky.service.UserService;
import com.sky.utils.HttpClientUtil;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.HashMap;
import java.util.Map;

@Service
@Slf4j
public class UserServiceImpl implements UserService {

    //微信服务接口地址
    public static final String WX_LOGIN = "https://api.weixin.qq.com/sns/jscode2session";

    @Autowired
    private UserMapper userMapper;
    @Autowired
    private WeChatProperties weChatProperties;

    /*
     * 微信登录
     * */
    public User WxLogin(UserLoginDTO userLoginDTO) {

        String openid = getOpenid(userLoginDTO.getCode());

        //判断openid是否为,如果为空表示登录失败,抛出异常

        if (openid == null)
        {
            throw  new LoginFailedException(MessageConstant.LOGIN_FAILED);
        }
        //如果是新用户，自动完成注册
        User user = userMapper.getByOpenid(openid);

        //如果是新用户，自动完成注册
        if (user == null)
        {
           user = User.builder()
                    .openid(openid)
                    .createTime(LocalDateTime.now())
                    .build();
           userMapper.insert(user);
        }

        //返回这个对象

        return user;
    }
    private  String getOpenid(String code)
    {
        //调用微信接口服务,获得当前用户的openid
        Map<String, String> map=new HashMap<>();
        map.put("appid",weChatProperties.getAppid());
        map.put("secret",weChatProperties.getSecret());
        map.put("js_code",code);
        map.put("grant_type","authorization_code");
        String json = HttpClientUtil.doGet(WX_LOGIN, map);

        JSONObject jsonObject = JSON.parseObject(json);
        String openid = jsonObject.getString("openid");
        return openid;
    }
}
